Eye-protector.



PATENTES PEB. 19, 19o?.

A eine:

' ing :it-53 Rue Notre Dame ful Improvements in Eye-Protectors'or Gregg 10 g istsanli others forwhich ent of the United States of America 'were Agranted to me, dated 'the 13th December,

- erence tothe accompanying drawings, Where- 5g n Ventilating-tubes c c are of flattened oval provided-webteam o l ss ; l.This invention rel tes toimprovernents in Figures 1" and -2 show the improved eyeprotector orl goggles, vhereafter re'erred to izo..

` rplete formin face and plan view, respectively,

afxed position relatively to the chamber B, whichcarries them, and areunushedat ,their exta'emitieswith air-filters o o', which vided with, flexible clipsoZ, adapted' to take tic form of the latter and adhere rmlyi `arran ement permits of the srariasv PATENT onirica; f

ELIE MrRovITcu-or man1-FRANCE,

EYE- PROTEcTo'n i no. 844,952. specification of Letters Batam.' l' fpatented Het. 19,190?. l. L

. @putains mei mmh a'i'ec. serio No. 307.400.

Be it known that I, ELIE Mrnovrrcn, doc-` tor of medicine of the' facult of Paris, residdi Lorette, Paris,

France, have invented certain .new and useg-les-forAutcmobilistsand Others, of lu the following is a specification. l

the eye-protectors or gogfgles for automobil-4 ormer Letters Pat- .The'mventionwill be described ref(- or convenience as spectacles', in its comvi'hile Figs. 3 to 12 show detailsof the novel portionsfoming the subject of thepreseb aplication.-

l i. ccording to the present Iinvention theform in cross-section, and instead of being open'at their rear extremities each tube is' ning on the "outer side of its rear end, T ese tubes c c are made of metal and are rigid, so asl to remain serve to .prevent flies and other insects as well as matter which might obscure the' vision from sii-ning access to the interior ofthe chamber between the lens a and the eye. The filters o o, which are illustrated in Figs. 3 and 4, maybe made of perforated metal gauze or equivalent material and are .pro-

onto the tubes c c-, so as to acquire the elli thereto Whenonce placed in osition. Th1

ters o o being detac ed With facility When not required or when the Ventilating-tubes c c are Ato` be cleaned out.

A further improvement relates to the articulated bridge-piece which connects the two chambers B. 1

According to the present invention the ex tensibilit "of the bridge-piece is obtained by means o aconstruction differing from the tratedjin the previousfpa't'ent referred to" above. The metallic arch forming the bridgepiece is constituted by two bent stems D D', halved together, and each connected 6o at'oe end by a ball-andi-socketjoint d to the i spectacle-frame in orderfgto of the spectacles being folded up the' smallest possible'slaxce. Each'stem f D, g"and`D is semicylin 'calfform for: aff)or tion of.its;( 5' length, and these portions varfeL's' uperpo'sedi 1i; ne'u on another, seas f ,ofioirfn onjoitlya comp ete cylindrical bodyjtvhichisijreceivedf "if inla 'scretv-nutfE, 'externally milled surface. The'jse'micylindricall1-stem's 16 are partiell screw-threaded,cne othefstems bearing a eft-handurrdfth bothlfajflglitrl," hand screwethreadywhile.theinterionof'mef screw-.nut E is smilarl screwethreade'd @See-Figs. 5 and 6.) WhenK the stenisD 'D lces -to .merelyturn the .latter 1n 'one' direc-'f' on or the other in order 'to re ate'th"dis`,j tance between the joints d an cohsequentlyj, --the distance between the lenses of the's'p'ec 8'9" iacles, so as to suitthe vision 4 of the i nd.ivi d i; pal using the' spectacles. Moreovenbythis construction the' axis ofthe ball-joints .gire-? #nains invariabl'yin the'same planewitl-the-l of the screw-nut E, sothat thebridge-:g piece is maintained without any deformation or gay suchas would result thesterns; D -were kmade' in a single piece; The fbridge-piece thus constructed, .-moreover,

presents a better a pearance, its bulk being' 9o ess than that of t e spring-slide, vvhile'its contact with the nose ofthe wearer is more agreeable in consequenceof the screw-nut E alone coming in contact with` the nose.

The superposition of the two semcylin-'-'95 drical portionsioffthe stems D Dis prefer# ably made in suchmanner as to presentthe joint between the two ilat faces in a vertical',-

lane, as shoyvmin F' 7, this. arrangementigiff imparting to the bri ge-piece a maximum wr power of resistance to such-forces. as would` tend to interfere with' the rimpel' relative po; Asition of the jointsy d. tions ofthe stems D D may,'however, be a'r ranged with. their meeting faceseextending inf a `thehorizontal direction, as seen Fig. 8.

A further improvement consists in giving tothe lenses of the spectacles 'an ol tical .conformation Adiffering -romf that lo thoseatf.. I'

'present in use forprdinary s ectacles. The :U ,goggles or eyeglasses should e so constmctf;

spring-pressed sliding `arrangement ed as net te restrict the field division, for theiY a A I 844,952

1 Zreasen thatthe driver of a motor-car must l necessarily -keep a constant lookout not-only .in-front of him but also at either side \as well f andho'th in his .immediate vicinity'and also 5` ata distance'in order to guard against accidents. The lenses now in use for such spectacles in' no way meet this requirement, as they are made With a view of obtaining a clear vision through their center alone, and

xo theyall give rise to phenomena (if deviation,

displacement, deformation, &e'., when the vision is directed toward their sides.

A person with normal vision capable, of

clearly ldistinguishing objects either close atr 5 hand or at a distance need only be protected' by neutral lenses,"and at present o nly two sorts of lenses are employed for use in suchcases'-viz., those which are flat on both faces and of uniform thickness, like windowzo glass, and those of curved glass,vpresenting two spherical concentric surfaces and also of uniform thickness; but these two kinds of neutral lenses do not give satisfactory results when employed as goggles. The necessity z5 which the`driver of a motor-car is under of very attentively guarding against accidents by directing his eyes all the time to right and left Without moving his head in the same direction (which would give rise to excessive 13,0v fatigue) involves the employmentof lenses which are very wide in the horizontal direction. Now looking obliquely acrossneutral lenses of the ordinary kinds gives rise to very 4serious visual troubles, more especially if the 3 5 lenses are not sufficiently large to permit vof vision-1n the most'pblique direction. This art of the invention consists in forming the enses with the maximum dimension called for in' the horizontal sense and so as to permit 4o nevertheless of the oblique visual rays passing without undergoing the slightest alterao tion. `These lenses when neutral have a uniform` thickness, as usual; but they are neither plane or spherical, but are of a curved orarched form, of which the curvature is in in Figs. 1,0, 11, and 12, in vertical section 'and plan View, respectively. For the better comprehension of this' part ofthe invention one may consider the neutral lenses as being cut, for example, from a cylindrical glass 'tuhe, the longerJI dimension of each lens extending circumferentially of the tube, while the narrow dimension extends in the direction 'of the 4axis of the tube. The lenses thus shaped the horizontal directiononly, as will be seen conform to the curvature of the eyeballs in the horizontal direction. They are traversed by the visual rays in a direction perpendicular to` the thickness of the lens', as well in horizontal oblique vision as in horizontal front vision, as can be seen by referring to Figs. 11 and 12. 'Hence obstacles onthe road on all sides appear vtothe driver in their real aspect, as they would if seen by ,lthe

naked eye. .f This new form of arched lens' is adapted for use by persons having abno'ri'nal vision of all kinds-eg., 'short-si hted, loing'- sighted, astigmatic, &c. Theari these lenses is more especially "adapted to form a basis -for the optical combination ed form of y whereby most kinds of abnormal vision may l be corrected.

I claim#- v In e 4eglasses or goggles for automobolists and ot ers, having a y ouble Ventilating-tube .and an extensible bridge-piece, the construction of the extensible bridge comprising two 

